Osprey Hydraulics Lumbar 1.5L Reservoir – Red, One Size

The Osprey Hydraulics Lumbar 1.5L Reservoir by Hydrapak is designed for those who prefer carrying water on their lower back, freeing up shoulder space for other gear. With twin-welded chevron baffles that stabilize water and maintain a flat profile, this reservoir fits comfortably in most lumbar packs, particularly Osprey's Seral mountain biking pack. The easy slide-seal top makes filling and cleaning a breeze, and the Hydrapak Blaster bite valve delivers fast, smooth flow with a quarter-turn on/off switch.

Osprey Hydraulics Lumbar Reservoir: Off-the-Shoulder Hydration

Whether you're mountain biking or hiking, this lumbar reservoir shifts weight to your lower back for better balance and comfort. The magnet clip secures the hose to your pack, keeping it accessible when you need a sip. All parts are BPA-free, phthalate-free, and lead-free, meeting FDA and EU food safety regulations.

Filling and Cleaning

The wide slide-seal opening lets you fill and clean easily, and the reservoir can be inverted for thorough drying. The 1.5-liter capacity is ideal for shorter outings, and the flat profile prevents sloshing and makes it easy to pack.

Compatibility and Fit

Designed to fit most lumbar packs, but perfectly pairs with Osprey's Seral pack. The included magnet clip attaches to compatible packs for secure hose management. If you're using a different pack, ensure it has a hydration sleeve and hose port.